I would shoot for between 120 to 160 lbs. pressure on the seats and from 325 lbs. to 375 lbs. at max lift, check the pushrod preload on the lifter cups and shoot for between .010 to .030 between the bottom of retainer and the top of pushrod cup up
Good luck, you can do this up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)